The hex color #c9dae4 is a light color. The web-safe version is Hex
#CCCCCC. A complementary color is
#36251B. The grayscale version is
#D8D8D8. A 20% lighter version of the original color is
#FCFFFF, and Hex
#96A7B1 is the 20% darker color. If the color is saturated by 10%, you get
#C8DAE5. If the color is desaturated by 10%, the color
#CADAE3 is obtained.